Volume 38, Número 6, 2015

ISSN:0100-4042ISSN:1678-7064 on line

Artigo

777 Caracterização de nanofios de germânio sintetizados utili-zando cobre como catalisador

Riama C. Gouveia, Hanay Kamimura, Rafael Munhoz, Ariano De G. Rodrigues, Edson R. Leite e Adenilson J. Chiquito

Ge nanowires grown from Cu catalyst. Morphological analysis showed that the nanowires are composed of single crystalline germanium with long range order. Electrical characterization confirmed the semiconductor behavior and identified VRH as the dominant transport mechanism.

769 Chemical constituents from the stem bark of Annona pickelii (Annonaceae)

Emmanoel V. Costa, Marília F. C. Sampaio, Marcos J. Salvador, Angelita Nepel and Andersson Barison

Twenty compounds, including three lignans and twelve alkaloids, were found in stem bark A. pickelli and the NMR data for several alkaloids were reviewed.

757 bis(4-Fluorophenylsulfonyldithiocarbimato)zincate(II) salts: new antifungals for the control of Botrytis blight

Alexandre A. Oliveira, Marcelo R. L. Oliveira, Mayura M. M. Rubinger, Elisa L. Piló, Daniele C. Menezes and Laércio Zambolim

Petri dishes containing colonies of Botrytis cinerea after 3 days of incubation at 22 oC, were treated with tetraphenylphosphonium bis(4-fluorophenylsulphonyldithiocarbimate) zincate(II) at six different concentrations and compared to a control (negative treatment check).

762 Influência da idade das folhas de Eugenia uniflora L. na composição química do óleo essencial

Frances R. Santos, Raimundo Braz-Filho e Rosane N. Castro

Oxygenated sesquiterpenes, furanodiene and germacrone were predominant in the essential oil of Eugenia uniflora and distinguished with respect to the age of the leaves.

iv Quim. Nova

787 Association of branched polyethylene imine with surfactants in aqueous solution

Ismael C. Bellettini, Renato Eising, Arlindo C. Felippe, Josiel B. Domingos, Edson Minatti and Vanderlei G. Machado

781 Development of oral nifedipine-loaded polymeric nanocapsu-les: physicochemical characterisation, photostability studies, in vitro and in vivo evaluation

Monika P. Tagliari, Andrea Granada, Marcos A. S. Silva, Hellen K. Stulzer, Betina G. Zanetti-Ramos, Daniel Fernandes, Izabella T. Silva, Claudia Mª O. Simões, Regina Sordi, Jamil Assreuy and Valdir Soldi

794 Identificação de compostos orgânicos em lixiviado de aterro sanitário municipal por cromatografia gasosa acoplada a espectrometria de massas

Eliane S. Rigobello, Ana P. J. Scandelai, Beatriz L. Corso e Célia R. G. Tavares

801 Determinação voltamétrica simultânea de besilato de an-lodipino e hidroclorotiazida em amostras de urina sintética utilizando um eletrodo de diamante dopado com boro

Laís P. Silva, Bruna C. Lourencao e Orlando Fatibello-Filho

Change of the pH of aqueous solutions of SDS–PEI, TTAB–PEI (●) and NaBr–PEI (●).

Development of nifedipine nanocapsules by interfacial deposition: a strategy to improve drug stability.

The LLE landfill leachate was evaluated under different conditions. The analyses carried out with a gas chromatograph coupled with a mass spectrometer allowed the identification of organic compounds in the leachate in the study.

Voltammetric behavior of amlodipine besylate and hydrochlorothiazide on boron-doped diamond electrode with hydrogen or oxygen terminations.

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813 Phytochemical and phylogenetic analysis of Spondias (Ana-cardiaceae)

Cristiane Pereira, Letícia L. de Oliveira, Ricardo Gonçalves, Ana C. F. Amaral, Ricardo M. Kuster and Cassia M. Sakuragui

807 Desenvolvimento de um método de preparo de amostras para avaliação de matérias-primas de materiais escolares

José A. Garcia e Edenir R. Pereira-Filho

817 Biossensoriamento estocástico via nanoporo proteico indi-vidual no desenvolvimento de ferramentas analíticas

Juliana P. Aguiar, Janilson J. S. Júnior, Dijanah C. Machado, Maria C. A. Melo e Cláudio G. Rodrigues

828 Produção do biometanol via gaseificação de biomassa lig-nocelulósica

Paulo Eichler, Fernando Santos, Marcilio Toledo, Patrícia Zerbin, Guilherme Schmitz, Camila Alves, Lúcias Ries e Fernando Gomes

The presence of flavonol 3-O-glycosides can be considered a synapomorphy of American Spondias, and the presence of rhamnetin 3-O-rutinoside coupled with phylogenetic data is evidence for the separation of the two Atlantic forest Spondias species in a distinct clade.

Evaluation of sample preparation method using microwave radiation, targeting the extraction of Ba, Cd, Cr, Hg and Pb in raw material samples of school supplies.

Alpha-toxin as prototype of a single protein nanopore for detection, quantification and characterization of molecules in aqueous systems.

Simplified fluxogram for biomethanol production processes with lignocellulosic biomass.

Revisão

vi Quim. Nova

842 Avaliação de diferentes reagentes colorimétricos para a de-terminação de formaldeído em amostras de ar em ambientes internos

Darllene Silveira, Jessica O. Fernandes e Elisabete A. Pereira

836 Análise Multivariada de Imagens na química: um experi-mento para determinação do pH de águas potáveis

Deangelis Damasceno, Thiago G. Toledo, Mariana S. Godinho, Cassiano P. da Silva, Sérgio B. de Oliveira e Anselmo E. de Oliveira

848 Pesticide residues in conventionally and organically grown tomatoes in Espírito Santo (Brazil)

Gleissy M. A. D. A. dos Santos, Luciano J. Q. Teixeira, Olavo S. Pereira Júnior, Alexandre R. dos Santos, Marcio Fronza, Ary G. Da Silva e Rodrigo Scherer

852 Avaliação metrológica da curva analítica para determinação do teor de enxofre em baixíssimas concentrações em óleo diesel S-10

Shirley L. de Farias, Lívio G. da Costa, Rodrigo F. Calili, Ramon M. Rios e Elcio C. de Oliveira

Formaldehyde reacts with MBTH to form an azine, which is oxidized by a ferric chloride in acid media to form a blue cationic dye. Formaldehyde reacts with Purpald reagent in alkaline media to form a purple anion dye. The Nash reagent method relies on the reaction of formaldehyde with acetylacetone in acidified ammonium acetate to form a yellow product.

A Multivariate Image Analysis (MIA) laboratory activity was proposed estimating pH of drinking water samples from its digital images after adding bromothymol blue as a pH indicator, and using the PLS multivariate calibration method.

The objective of this paper was to monitor pesticide residues in conventionally and organically grown tomatoes from different markets in Vitória and Vila Velha cities (Espírito Santo, Brazil).

This work, on the determination of very low concentrations of sulfur content in diesel S-10 by MWDXRF, breaks two paradigms: every curve should be adjusted by an unweighted linear regression and all samples must be read in the central part of the analytical curve.

Nota Técnica

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864 Degradação térmica de tocoferol e produtos de oxidação em diferentes classes de azeite de oliva utilizando espectroscopia UV-Vis e MCR-ALS

Rhayanna P. Gonçalves, Paulo H. Março e Patrícia Valderrama

The instrumental signals (D), relating to components of olive oil samples, were isolated and resolved by MCR-ALS in terms of quantitative contributions on the pure components (C) and spectral profiles (ST), respectively.

859 Prototipagem de microrreatores fotocatalíticos e testes de fotodegradação de corantes orgânicos

Omar Pandoli, Tommaso Del Rosso, Vinicius M. Santos, Renan de S. Rezende e Bojan A. Marinkovic

Schematic diagram depicting adopted procedure for low-cost microfabrication of a PDMS/Glass microreactor.

868 Desenvolvimento de fármacos por hibridação molecular: uma aula prática de química medicinal usando comprimidos de paracetamol e sulfadiazina e a ferramenta virtual SciFinder®

Cleônia R. M. Araújo, Carlos A. Leite Filho, Victória L. dos A. Santos, Gabriela L. de A. Maia e Arlan de A. Gonsalves

Drug development by molecular hybridization: a medicinal chemistry practice class using paracetamol and sulfadiazine tablets and the virtual tool SciFinder®.

874 Acetanilida: síntese verde sem solventeSilvio Cunha, Otelício B. dos S. da Costa, Lourenço L. B. de Santana e Wilson A. Lopes

A solvent-free synthesis of acetanilide without the use of additives was developed in the context of green chemistry.

Educação